There are several artists going by the name of Dirty Dog:
1) A romanian classic/blues rock band.
2) A russian-american rock band.
3) A dubstep artist from the UK, currently at Caspa’s Dub Police record label.  Dirty Dog was a romanian classic/blues rock band. Band members Rares Branzoi (drums), Vlad Dumitrescu (guitar/vocals) and Paul Dragusin (bass/keyboards/vocals) got together in august 2010 for some jam sessions that turned out surprisingly well. The group decided on the name Dirty Dog soon after.